Allow Multiple Label Values per Key for a Host

[r.sander (Robert Sander)]

@msommer

Creating host, service and contact groups assignment from a label.
Example: contactgroup:group1; contactgroup:group2, assigning a host to both groups.

Compose agent bakery rules by a label.
Example: app:splunk; app:grafana, installing both plugins for one server.

You can achieve exactly the same with contactgroup/group1:yes and contactgroup/group2:yes and app/splunk:yes and app/grafana:yes.